US STOCKS-Futures flat a day after S&P touches record high

Aug 9 (Reuters) - U.S. stock index futures were little changed on Tuesday as investors looked for market-moving catalysts, a day after the S&P 500 index touched a record intraday high.

* On Monday, Wall Street closed down in one of its lowest volume trading day this year, after the S&P slipped from its record high as healthcare stocks weighed.

* Investors will continue to assess the rest of second-quarter earnings and economic data to justify valuations.

* While earnings of S&P 500 companies are expected to decline at a slower rate than anticipated at the start of the season, investors worry that the earnings recession may spill into the third quarter.

* Analysts polled by Reuters expect third-quarter earnings for S&P 500 components to fall 0.2 percent, as of Monday. They had estimated a 0.2 percent rise on Aug. 3, according to Thomson Reuters data.

* However, a forecast-beating payrolls report on Friday has helped bring back some of the risk-on mode in the markets. Safe havens gold and the Japanese yen were lower on Tuesday.

* Oil prices were largely flat after rising 2.5 percent on Monday on renewed hopes that OPEC members would work out a plan to freeze output.

* Investors will also keep an eye on economic data including a Labor Department report at 8:30 a.m. ET (1230 GMT), which is likely to show productivity rose 0.4 percent in the second quarter after declining 0.6 percent in the preceding quarter.

* If the trend of robust economic data continues, it could encourage the Federal Reserve to raise interest rates sometime this year.

* Valeant rose 7.3 percent to $24.12 premarket after the company maintained its full-year forecast and announced strategic changes to its business.

* SolarCity, the target of an acquisition by Tesla , was down 3.4 percent at $23.50. The company is scheduled to report results after markets close.